To provide a moistureproof insulating coating material excellent in moisture resistance, electric characteristics, especially in insulation resistance value.

The visible light polymerizable composition comprises (A) a silane modified urethane acrylate produced by reacting (a) a diol component comprised of a polycarbonate diol whose number average molecular weight is 500-3,000 and dimethylol propynoic acid, with (b) a diisocyanate component, reacting the resultant product with (c) a one hydroxyl group-containing (meth)acrylate, and further reacting the resultant mixture with one or more sorts of (d) a specified glycide group-containing silane compound of 1.00-0.25 moles against one mole of dimethylol propynoic acid contained in the component (a), (B) phthalic acid anhydride imide acrylate, (C) a light polymerizable compound, (D) a visible light polymerization initiator, and (E) a paraffine-based wax.